Thanks Brad - you can tell this hits a button with me because I WAS HORRIFIED at the thought! Anway - just want to make sure I hear you saying in your opinion, even if the rats are bigger than previous feedings of mice - it is okay to try. I do put the frozen rodent close to cage to scent. That was a big help in how he ate. When I quite trying to move to another container for feeding that too was big help. They had me convinced in the beginning it was bad to leave in living quarters to eat..... So - your vote is go for the frozen, larger rat. Right?